Add enum module features new in 3.11 (#7358)

stdlib/enum.pyi

@@ -163,16 +163,22 @@ class Enum(metaclass=EnumMeta):
     def __hash__(self) -> Any: ...
     def __reduce_ex__(self, proto: object) -> Any: ...
 
-class IntEnum(int, Enum):
-    _value_: int
-    if sys.version_info >= (3, 11):
+if sys.version_info >= (3, 11):
+    class ReprEnum(Enum): ...
+
+if sys.version_info >= (3, 11):
+    class IntEnum(int, ReprEnum):
+        _value_: int
         @property
         def value(self) -> int: ...
-    else:
+        def __new__(cls: type[Self], value: int | Self) -> Self: ...
+
+else:
+    class IntEnum(int, Enum):
+        _value_: int
         @types.DynamicClassAttribute
         def value(self) -> int: ...
-
-    def __new__(cls: type[Self], value: int | Self) -> Self: ...
+        def __new__(cls: type[Self], value: int | Self) -> Self: ...
 
 def unique(enumeration: _S) -> _S: ...
 
@@ -221,12 +227,24 @@ class IntFlag(int, Flag):
     def __rxor__(self: Self, n: int | Self) -> Self: ...
 
 if sys.version_info >= (3, 11):
-    class StrEnum(str, Enum):
+    class StrEnum(str, ReprEnum):
         def __new__(cls: type[Self], value: str | Self) -> Self: ...
         _value_: str
         @property
         def value(self) -> str: ...
 
+    class EnumCheck(StrEnum):
+        CONTINUOUS: str
+        NAMED_FLAGS: str
+        UNIQUE: str
+    CONTINUOUS = EnumCheck.CONTINUOUS
+    NAMED_FLAGS = EnumCheck.NAMED_FLAGS
+    UNIQUE = EnumCheck.UNIQUE
+
+    class verify:
+        def __init__(self, *checks: EnumCheck) -> None: ...
+        def __call__(self, enumeration: _S) -> _S: ...
+
     class FlagBoundary(StrEnum):
         STRICT: str
         CONFORM: str
@@ -241,6 +259,7 @@ if sys.version_info >= (3, 11):
         def __set_name__(self, ownerclass: type[Enum], name: str) -> None: ...
         name: str
         clsname: str
-    def global_enum(cls: _S) -> _S: ...
+    def global_str(self: Enum) -> str: ...
+    def global_enum(cls: _S, update_str: bool = ...) -> _S: ...
     def global_enum_repr(self: Enum) -> str: ...
     def global_flag_repr(self: Flag) -> str: ...